If you are looking for a Non-return check valve￡? you should choose the one we serve here. TheRed Cylinder Round Non-return Check Valve for Aquarium Air Pump which is for connecting to your air pump or air driven system. It is a backflow prevention device specially designed to prevent water contamination. The Cylinder Non-return Check Valve for Aquarium Air Pump ensures the air to pass in only one direction which protects your pump from accidental power loss. Come and check it out￡? you will not regret to buy it!                                    Features            Top quality material and low resistanceProtect you air pump from back siphoning during a power outageSmall and compact￡? very easy to useA necessity for your aquarium water cleannessReasonable price for good quality                                                            Specifications            Color: Rose RedMaterial: PlasticDimensions: (2.08 x 0.59)" / (5.3 x 1.5)cm(L x Dia.)Weight: 0.04 oz / 1g                                                            Package Includes            1 x Cylinder Non-return Check Valve for Aquarium Air Pump RoseRed